中国现有草地面积 3.9 亿公顷，其中可利用面积 3.2 亿公顷，居世界第三位。（ ）
A.There is a 390 million hectares grassland in China. In the grassland, about 320 million hectares can be cultivated, and it places China the third in the world. B.China has grassland area of 390 million hectares, of which about 320 million hectares can be cultivated, which places China the third in the world. C.China has grassland area of 390 million hectares, of which about 320 million hectares can be cultivated which places China the third in the world. D.There is 390 million hectares grassland in China. In the grassland, about 320 million hectares can be cultivated, places China the third in the world.正确答案B
